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[英]How to match only month and year part from datetime column in SQL Server
[英]Year part update in SQL Server DateTime column
您可以使用 DATEADD() 函數更新所有數據列
update t1
set update_at = t2.update_now
from (select id,DATEADD(year, 1,update_at ) as update_now from t1) as t2
where t1.id = t2.id
select * from t1;
DECLARE @DateCol datetime = '2020-02-08 13:55:30.193'
SELECT
CONVERT(varchar(50), DATEPART(YYYY,'2017-02-08')) + '-' +
CONVERT(varchar(50), DATEPART(mm, @DateCol)) + '-' +
CONVERT(varchar(50), DATEPART(dd, @DateCol)) + ' ' +
CONVERT(char(12), CAST(@DateCol AS TIME))
輸出
2017-2-8 13:55:30.193
我個人會使用DATETIMEFROMPARTS
函數 - 似乎是最干凈的方法,無需將每個DATETIME
轉換為字符串,然后擺弄剪斷並再次將字符串粘在一起並轉換回DATETIME
....
嘗試這個:
SELECT
Id, ChangedDate,
DATETIMEFROMPARTS(2017, MONTH(ChangedDate), DAY(ChangedDate),
DATEPART(HOUR, ChangedDate), DATEPART(MINUTE, ChangedDate),
DATEPART(SECOND, ChangedDate), DATEPART(MILLISECOND, ChangedDate))
FROM
dbo.YourTableNameHere
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